Poor AC performance Due to Evaporator Temperature Sensor Failure on Mercedes-Benz S500

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the air will be very cold at first, before warming up.

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Average mileage: 117,827 (45,000–238,000)
8 model years affected: 1996, 2000, 2001, 2002, more2003, 2004, 2005, 2006
16 people reported this problem
5 people shared problem details
Mine quit at the above mileage some years ago. Abourt $300 parts and labor at the dealer. Failure causes A/C to freeze up and blocks airflow. After a few days of this, the A/C shut itself off to prevent damage...the ECON button stays lit up to tell you something is wrong.
Ok so one day the ac stops working blower motor wouldn't even come on when I put it on heat mode, replaced blower motor, still no action, the mechanic replaces the resistor and now we've got air blowing the only problem its hot air still no ac, then mechanic goes in to say oh you need a new ac compressor, dryer exchange, and expansion valve, so let me get this straight.....he missed diagnosed it and all it needed was a resistor 200.00 so I get a non needed blower motor 400.00 875.00 parts labor and tax but still no ac, and now tells me it's gonna be 1375.00 for parts labor and tax for a new compressor, dryer exchange, and expansion valve, I mean REALLY, DOES ANYONE BELIEVE THAT HE KNOWS WHAT THE H*#L HES DOING BESIDES SCREENING ME OVER 7 WAYS TO SUNDAY??????
My ec light stayS on and want go off. a/c does not cool. PLEASE HELP
Ac only works if u set it on low I mean low
Fan stoped working got a new blower unit now it's working but my a/c is not .
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